Tariff exposure
How exposed is your product to U.S. sourcing and tariffs?
MapleBOM reads your bill of materials and shows which components, suppliers and purchasing dollars create foreign sourcing exposure — including the lines with no country of origin on file at all.
MapleBOM does not calculate tariff liability, and nothing here is a regulatory determination. It gives you what every tariff calculation needs first: an accurate, honest picture of reported origin across your BOM.
BOM uploads are analyzed transiently in memory and are not retained. How this works
The problem
The tariff question always stalls in the same place.
Somebody asks what a tariff change costs you. The answer needs origin and classification for every affected line. What exists is a BOM with a country column that is a third empty, a broker who has some of it, and a week of emails. By the time you have a number, the question has moved on.
Origin drives duty, not your supplier
A part bought from a Canadian distributor can be manufactured anywhere. Duty follows the factory, not the invoice.
The gaps are where the risk hides
The lines with no recorded origin are exactly the ones you cannot model. They are usually not the cheap ones.
Classification comes after origin
HS codes only help once you know what you are classifying and where it came from. Most BOMs have neither on every line.
The core output
Start with the lines you cannot answer for.
MapleBOM ranks every component with no established origin by the money attached to it — the exact lines that would break a tariff model.
In the sample analysis, 480 components have no established country of origin — but 10 supplier conversations would account for 80% of that exposure.
Unresolved origin, ranked by spend
Sample| Component | Supplier | Annual purchasing |
|---|---|---|
| Skid frame assembly, welded and m… | Ironwood Structural Compo… | $157,233 |
| Variable frequency drive, 75 kW 4… | Trillium Automation Supply | $69,707 |
| Servo drive, 1.5 kW dual axis | Trillium Automation Supply | $61,917 |
| Guarding package, perimeter fence… | Bluewater Enclosure Syste… | $60,869 |
| Panel air conditioner, 1200 W 480… | Meridian Electrical Supply | $51,269 |
| Conveyor module, 3 m belt section… | Ironwood Structural Compo… | $49,693 |
What you get
A complete provenance profile of one product, in about ten seconds.
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Overview
Components, suppliers, total purchasing, and how much of it has an established country of origin — by line count and by dollar.
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Country exposure
Purchasing attributed to Canada, the United States, China, Mexico and every other origin your file names, plus the unverified share.
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Provenance gaps
Unresolved components ranked by spend, and the suppliers who hold the answers, so the work list is finite.
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Supplier concentration
Top supplier, top five and top ten as a share of purchasing, with a concentration index and each supplier's origin coverage.
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Foreign dependencies
The largest components and suppliers behind each non-Canadian origin. Presented as information, not as a verdict.
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Data quality
Exactly how we read your columns, what we could not interpret, and which figures are affected by missing data.
What MapleBOM will not do
Provenance is only useful if it is true. These are the rules the analysis follows, without exception:
- We never infer country of origin from a supplier, manufacturer, distributor or company nationality. Buying a part from a Canadian distributor does not make it Canadian.
- Anything the file does not establish is reported as Unknown / Unverified, with the reason it is unresolved.
- Country values we cannot interpret are surfaced, not silently dropped or guessed.
- V0 makes no CUSMA, tariff, Canadian-content or Buy Canadian determination. Those require rules and evidence this tool does not yet have.
- Facts you supplied, figures we calculated, and information nobody has are labelled separately throughout.
On the roadmap
What would you like to do next?
None of these are built. They are in private beta, and they are here so you can tell us which one actually matters — we will run it by hand for one product in the meantime.
Tariff exposure
Understand which components and purchasing categories may be affected by changing tariffs.
Calculate tariff exposure → Private betaCanadian content and CUSMA
Identify documentation gaps and the components that would need deeper qualification.
Analyze Canadian content → Private betaCanadian supplier alternatives
Discover foreign components that may have Canadian manufacturing or sourcing alternatives.
Find Canadian suppliers → Private betaResolving unverified origins
Track evidence and supplier attestations for the components nobody can currently vouch for.
Resolve unknown origins →None of these are built. Nothing on this page produces tariff, CUSMA, Canadian-content or Buy Canadian results, and no figure elsewhere in MapleBOM is derived from them. Following one of these links tells us you want it, and offers you the analysis by hand in the meantime.
Built in Canada
An independent project.
MapleBOM is built by Tyson Hamilton, a Canadian software engineer building better trade and supply-chain tools for Canadian manufacturers.
It is early, and deliberately narrow: it reports what your bill of materials establishes, and says plainly what it does not.
Questions, feedback, or interested in trying MapleBOM with your own data?
hello@maplebom.caWant us to resolve the unknowns?
We are working with a small number of Canadian manufacturers on deeper BOM provenance and supply-chain analysis. If unverified origin is costing you time, we would like to hear about it.